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Showing items 6751 through 6759 of 6793.
Wars, drought and social collapse have greatly impaired land management and agriculture production systems in the southeastern Afghanistan provinces of Khost, Paktika and Paktya. This region has long existed with limited central government influence and remains particularly unstable.
Desertification, which affects more than two-thirds of the world's arid and semi-arid regions, is a significant global ecological and environmental problem. There is a strong link between desertification of the drylands and emission of COâ from soil and vegetation to the atmosphere.
Land use and land cover changes in the Brazilian Amazon have major implications for regional and global carbon (C) cycling. Cattle pasture represents the largest single use (about 70%) of this once-forested land in most of the region.
Earlier studies on soil degradation in Vertisols of the Purna Valley of central India indicated that the semiarid climate characterized by a mean annual rainfall (MAR) of 875mm and a tropustic moisture regime is responsible for the development of calcareous sodic soils.
Although producers' prime objective may be to increase net returns, many are also interested in conserving and enhancing the quality the soil, water and air resources through adopting more environmentally friendly production practices.
1. Little is known about the diversity and land management response of native solitary bees in globally rare barrens restricted to the northeastern United States. Herein we assess solitary bee diversity in a scrub oak barrens 2 years after a mow and herbicide treatment. 2.
The composition and structure of bacterial communities were examined in soil subjected to a range of diverse agricultural land management and crop production practices.
The present e-collection of scientific works deals with results of research on issues of economy, agrarian and engineering sciences studied by researchers, post-graduate students, magisters and students of Mykolayiv State Agrarian Univ.
Soil erosion and subsequent degradation has been a contributor to societal collapse in the past and is one of the major expressions of desertification in arid regions.
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